PO n° 3646 (Batignolles-Chatillon n° 114/1921). This locomotive was based on Etat design and was ordered by Public work ministery for rebuilding plan after WWI. It was transferred to Etat in 1934, as Etat 231-406, and became SNCF 3 231 C 406 in 1938. Bordeaux (33), 1930. Collection Jean-Pierre Vergez-Larrouy (jean-pierre.vergez@tele2.fr)